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Variable global dysconnectivity and individual differences in schizophrenia
Cole, Michael W. (Avtor), Anticevic, Alan (Avtor), Repovš, Grega (Avtor), Barch, Deanna M. (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://www.sciencedirect.com/science/article/pii/S0006322311001442 Povezava se odpre v novem oknu

Izvleček
Background: A fundamental challenge for understanding neuropsychiatric disease is identifying sources of individual differences in psychopathology, especially when there is substantial heterogeneity of symptom expression, such as is found in schizophrenia (SCZ).We hypothesized that such heterogeneity might arise in part from consistently widespread yet variably patterned alterations in the connectivity of focal brain regions. Methods: We used resting state functional connectivity magnetic resonance imaging to identify variable global dysconnectivity in 23 patients with DSM-IV SCZ relative to 22 age-, gender-, and parental socioeconomic status-matched control subjects with a novel global brain connectivity method that is robust to high variability across individuals. We examined cognitive functioning with a modified Sternberg task and subtests from the Wechsler Adult Intelligence Scale-Third Edition. We measured symptom severity with the Scale for Assessment of Positive and Negative Symptoms. Results: We identified a dorsolateral prefrontal cortex (PFC) region with global and highly variable dysconnectivity involving within-PFC underconnectivity and non-PFC overconnectivity in patients. Variability in this "under/over" pattern of dysconnectivity strongly predicted the severity of cognitive deficits (matrix reasoning IQ, verbal IQ, and working memory performance) as well as individual differences in every cardinal symptom domain of SCZ (poverty, reality distortion, and disorganization). Conclusions: These results suggest that global dysconnectivity underlies dorsolateral PFC involvement in the neuropathology of SCZ. Furthermore, these results demonstrate the possibility that specific patterns of dysconnectivity with a given network hub region might explain individual differences in symptom presentation in SCZ. Critically, such findings might extend to other neuropathologies with diverse presentation.

Jezik:Angleški jezik
Ključne besede:shizofrenija, funkcijsko magnetnoresonančno slikanje (fMRI), prefrontalni korteks, psihopatologija, funkcionalna konektivnost, globalna možganska konektivnost, schizophrenia, functional magnetic resonance imaging (fMRI), prefrontal cortex, psychopathology, functional connectivity, global brain connectivity
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FF - Filozofska fakulteta
Leto izida:2011
Št. strani:str. 43-50
Številčenje:Vol. 70, iss. 1
UDK:159.95:616.895.8
ISSN pri članku:0006-3223
DOI:10.1016/j.biopsych.2011.02.010 Povezava se odpre v novem oknu
COBISS.SI-ID:46640482 Povezava se odpre v novem oknu
Število ogledov:653
Število prenosov:249
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Naslov:Biological psychiatry
Skrajšan naslov:Biol. psychiatry
Založnik:Elsevier
ISSN:0006-3223
COBISS.SI-ID:9486553 Povezava se odpre v novem oknu

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